Just to make sure you know where you urinate from (urtheral opening) is a different hole from your vaginal opening? Unless you've got something else going on down there.
Whenever there is bleeding its good to get it checked out. UTIs are dangerous in 1st trimester. Even if it's blood from that I'd get checked out. I always think, when in doubt check it out. That's what having an OB is for.
I meant to say UTIs can be dangerous..darn auto correct